Resident Population in York County, ME was 220.14300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in York County, ME reached a record high of 220.14300 in January of 2024 and a record low of 111.57600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in York County, ME - last updated from the United States Federal Reserve on September of 2025.